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CrashStats

B4508 accidents: crash map and statistics

Police recorded 140 collisions on the B4508 from 1979 to 2024, with 201 casualties. Of those crashes, 1 was fatal and 38 serious, and 1 person was killed.

No collisions were recorded on the B4508 in 2025, after 6 in 2024.

Collisions since 1979
140
3,673rd highest of 4,923 roads
Casualties
201
1.44 per collision
Fatal collisions
1
1 person killed
Serious collisions
38
45 seriously injured
Collisions in 2025
0
6 in 2024
Casualties in 2025
0
8 in 2024

Crash severity on the B4508

On the B4508, 0.7% of collisions were fatal and 27% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2024

  • Fatal10.7%
  • Serious3827%
  • Slight10172%

Where the B4508 ranks among 4,923 roads

Most collisions
3,673rd
Most casualties
3,617th
Most fatal collisions
3,933rd
Most serious collisions
3,345th

B4508 accidents by year

Collisions on the B4508 peaked at 6 in 2024; none were recorded in 2025.

Collisions and casualties on the B4508, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202500
202468
202300
202247
202123
202024
201913
201844
201746
201622
201535
201411
201334
201247
201145
201014
200956
200847
200747
200623
200567
200444
200368
200236
200169
200011
1999511
199823
199734
199611
199558
199411
199333
199245
199155
199044
198900
198856
198712
198622
198522
198412
198311
198244
198139
198011
197956

When crashes happen on the B4508

Friday has the most collisions on the B4508 (31), and 6pm to 9pm is the busiest time of day (32).

Collisions by day of the week

  • Monday15 (11%)
  • Tuesday20 (14%)
  • Wednesday16 (11%)
  • Thursday29 (21%)
  • Friday31 (22%)
  • Saturday14 (10%)
  • Sunday15 (11%)

Collisions by time of day

  • Midnight to 3am7 (5%)
  • 3am to 6am1 (0.7%)
  • 6am to 9am18 (13%)
  • 9am to noon17 (12%)
  • Noon to 3pm21 (15%)
  • 3pm to 6pm30 (21%)
  • 6pm to 9pm32 (23%)
  • 9pm to midnight14 (10%)

Collisions by month

  • January10 (7.1%)
  • February12 (8.6%)
  • March12 (8.6%)
  • April12 (8.6%)
  • May15 (11%)
  • June10 (7.1%)
  • July9 (6.4%)
  • August10 (7.1%)
  • September17 (12%)
  • October14 (10%)
  • November11 (7.9%)
  • December8 (5.7%)

Light conditions at the time

  • Daylight92 (66%)
  • Dark, no street lighting46 (33%)
  • Dark, street lights lit2 (1.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4508 crashes

On the B4508, 83% of collisions happened where the speed limit was 60 mph and 60% on a dry road surface.

Speed limit at the scene

  • 30 mph12 (8.6%)
  • 40 mph9 (6.4%)
  • 50 mph3 (2.1%)
  • 60 mph116 (83%)

Weather at the time

  • Fine, no high winds110 (79%)
  • Raining, no high winds15 (11%)
  • Fog or mist3 (2.1%)
  • Fine with high winds2 (1.4%)
  • Other9 (6.4%)
  • Not recorded1 (0.7%)

Road surface

  • Dry84 (60%)
  • Wet or damp51 (36%)
  • Frost or ice4 (2.9%)
  • Snow1 (0.7%)

Type of road

  • Single carriageway139 (99%)
  • One way street or slip road1 (0.7%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4508 crashes

Car occupants make up 74% of the people killed or injured on the B4508, followed by motorcyclists (14%).

Casualties by road user

  • Car occupant149 (74%)
  • Motorcyclist29 (14%)
  • Cyclist11 (5.5%)
  • Bus or coach occupant4 (2%)
  • Van occupant4 (2%)
  • Pedestrian3 (1.5%)
  • Taxi or private hire car occupant1 (0.5%)

Vehicles involved

  • Car173 (74%)
  • Motorcycle26 (11%)
  • Pedal cycle13 (5.6%)
  • Van or goods vehicle up to 3.5 tonnes9 (3.8%)
  • Goods vehicle over 3.5 tonnes5 (2.1%)
  • Agricultural vehicle2 (0.9%)
  • Bus or coach2 (0.9%)
  • Other4 (1.7%)

Casualties by age

  • 6 to 102 (1%)
  • 11 to 157 (3.5%)
  • 16 to 2057 (28%)
  • 21 to 2532 (16%)
  • 26 to 3536 (18%)
  • 36 to 4523 (11%)
  • 46 to 5516 (8%)
  • 56 to 6512 (6%)
  • 66 to 757 (3.5%)
  • Over 753 (1.5%)
  • Not recorded6 (3%)

Drivers, passengers and pedestrians

  • Driver or rider145 (72%)
  • Passenger53 (26%)
  • Pedestrian3 (1.5%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4508

Map of the 25 most recent crashes on the B4508

Use the arrow keys to move the map and the plus and minus keys to zoom.

  • 25 crashes
  • Serious
  • Slight

B4508 crashes by council area

Collisions on the B4508 were recorded in 3 council areas. Vale of White Horse has the most, with 119, followed by Swindon (15) and South Gloucestershire (4).

Collisions on the B4508 in each area, 1979 to 2024
RankAreaCollisionsCasualtiesFatalSerious
1stVale of White Horse119173135
2ndSwindon152003
3rdSouth Gloucestershire4600

B4508 crashes by town

Of the 140 collisions on the B4508, 3 were in the built-up area of Shrivenham and Watchfield.

Recent crashes on the B4508

These are the 25 most recent collisions on the B4508, from 28 February 2016 to 26 October 2024.

Severity